package com.jar.exercise.集合和数据结构.HashTable使用;

import java.util.Hashtable;

/**
 * @author ZhangShengHao
 * @className Demo
 * @description TODO
 * @date 2020/2/26 19:23
 */
public class Demo {
	public static void main(String[] args) {
		Hashtable<String, String> hashtable = new Hashtable<>();
		hashtable.put("null", null);
		hashtable.put("1", "1");
		for (String s : hashtable.keySet()) {
			System.out.println(s + ":" + hashtable.get(s));
		}
	}
}
